論文

2013年1月

In vivo pre- and postoperative three-dimensional knee kinematics in unicompartmental knee arthroplasty.

Journal of orthopaedic science : official journal of the Japanese Orthopaedic Association
  • Tomoharu Mochizuki
  • ,
  • Takashi Sato
  • ,
  • Osamu Tanifuji
  • ,
  • Kouichi Kobayashi
  • ,
  • Yoshio Koga
  • ,
  • Hiroshi Yamagiwa
  • ,
  • Go Omori
  • ,
  • Naoto Endo

18
1
開始ページ
54
終了ページ
60
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1007/s00776-012-0322-9

BACKGROUND: Pre- and postoperative knee kinematics in unicompartmental knee arthroplasty (UKA) can be theoretically related to clinical outcome and longevity after UKA with regard to ligament function and the degree of arthritic changes. However, the preoperative knee kinematics of patients indicated for UKA remain to be elucidated, and it is also unclear whether the preoperative kinematics can be maintained by the UKA procedure. The objective of this study was to examine the in vivo pre- and postoperative three-dimensional knee kinematics in UKA while referencing the normal knee kinematics reported in our previous study. METHODS: We analyzed the knee kinematics in 17 knees (14 patients) undergoing UKA via a three-dimensional to two-dimensional registration technique employing femoral condylar translation and femoral axial rotation. The pre- and postoperative knee kinematics during squat motion were evaluated in the same subjects, employing consistent evaluation parameters. RESULTS: On average, both pre- and postoperative knee kinematics in the range 10-100° of knee flexion demonstrated near-consistent femoral external rotation and anterior translation of the medial condyle and posterior translation of the lateral condyle. However, the mean femoral external rotation angle and the posterior translation of the lateral condyle postoperatively were significantly smaller than the values observed preoperatively. DISCUSSION: Although the patterns of preoperative knee motion were similar to those seen in normal knees, the magnitude of this motion varied widely between patients, so it was not necessarily representative of normal knees. These variations may be due to the varying degrees of arthritic changes caused by osteoarthritis. Although the patterns of knee kinematics were largely maintained by the UKA procedure, the causes of the significant reductions in the magnitude of motion upon performing the UKA procedure should be investigated in subsequent studies with a larger number of patients.

リンク情報
DOI
https://doi.org/10.1007/s00776-012-0322-9
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/23114856
ID情報
  • DOI : 10.1007/s00776-012-0322-9
  • PubMed ID : 23114856

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